Anaesthesia, not surgical stress, induces increases in serum concentrations of reverse triiodothyronine and thyroxine during surgery.


Effects of anaesthesia on serum concentrations of thyroid hormones during and soon after abdominal surgery were examined in 29 patients undergoing cholecystectomy (n = 22) or removal of gastric cancer (n = 7). They were given one of the following anaesthetics in combination with nitrous oxide in oxygen: epidural bupivacaine, enflurane, pentazocine, ketamine… (More)